[1] Univ Munich, Ctr Nephrol, Med Polyclin, Munich, Germany
[2] Univ Cologne, Fac Med, Merheim Med Ctr, Cologne Gen Hosp,Dept Internal Med 1, Cologne, Germany
[3] Univ Munich, Max Von Pettenkofer Inst, Munich, Germany
[4] Univ Munich, Inst Pathol, D-8000 Munich, Germany
[5] Roche Diagnost GmbH, Penzberg, Germany
[6] Hal Univ, Dept Mol Biol & Genet, Istanbul, Turkey